| Project/Area Number |
23684042
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2011-11-18 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Fiscal Year 2013: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2012: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
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| Keywords | 蛇紋岩化作用 / 水熱反応実験 / 加水反応 / 焼結体 / かんらん石 / 反応ー体積膨張 / 水熱実験 / 空隙率 / 離散要素法 / 海洋リソスフェア / 蛇紋石 / pH / 岩石－水相互作用 / 反応速度 / 反応に起因する破壊 / 熱水変質 |
|---|
| Research Abstract |
Serpentinization is an important process for global water circulation; however, the mechanism of serpentinization is still poorly understood. In this study, we carried out the hydrothermal experiments on serpentinization in the olivne-H2O system, by using both olivine powder and olivine sintered aggregate. We found that serpentinization proceeds effectively with fracturing of olivine grains, and reaction progress of sintered olivine aggregate changes depending on initial porosity. Similarity in the reaction texture between natural and synthetic serpentinites indicates that volume expansion, fracturing and effective mass transport becomes important during the hydration of oceanic lithosphere.
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